/**
 * This file is part of 1genia trampoline
 * Copyright (C) 2007 1genia (contact@1genia.com)
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; version 3 of the License. 
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details. 
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; see the file COPYING.TXT.  If not,
 * write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301, USA. 
 **/
package com.genia.toolbox.projects.toolbox_basics_project.business.dao.impl;

import com.genia.toolbox.persistence.bean.Persistable;
import com.genia.toolbox.persistence.dao.AbstractDAO;
import com.genia.toolbox.persistence.exception.ObjectIsNotPersistentException;
import com.genia.toolbox.persistence.exception.PersistenceException;
import com.genia.toolbox.projects.toolbox_basics_project.bean.model.City;
import com.genia.toolbox.projects.toolbox_basics_project.bean.model.impl.CityImpl;
import com.genia.toolbox.projects.toolbox_basics_project.business.dao.CityBusinessDao;

/**
 * a {@link CityBusinessDao} implementation.
 */
public class CityBusinessDaoImpl
    extends AbstractDAO
    implements CityBusinessDao
{

  /**
   * update city.
   * 
   * @param city
   *          an {@link City}.
   * @return the {@link City}
   * @throws PersistenceException
   *           the persistence Exception.
   */
  public City updateCity(City city)
      throws PersistenceException
  {
    if (city instanceof Persistable) {
      super.update((Persistable<?>) city);
      return city;
    }
    else {
      throw new ObjectIsNotPersistentException();
    }
  }



  /**
   * returns a {@link City} knowing its identifier.
   * 
   * @param identifier
   *          the identifier of the {@link City}
   * @return the {@link City} associated to the given identifier or
   *         <code>null</code> if no such city exists.
   */
  public City getCity(Long identifier)
  {
    return (City) super.get(CityImpl.class, identifier);
  }



  /**
   * delete {@link City} with this identifier.
   * 
   * @param identifier
   *          {@link City} identifier.
   * @throws PersistenceException
   *           the persistence exception.
   */
  public void delete(Long identifier)
      throws PersistenceException
  {
    delete(get(CityImpl.class, identifier));
  }



  /**
   * save {@link City} city.
   * 
   * @param city
   *          to save
   * @return the {@link City}.
   * @throws PersistenceException
   *           the persistence exception.
   */
  public City saveCity(City city)
      throws PersistenceException
  {
    if (city instanceof Persistable) {
      super.save((Persistable<?>) city);
      return city;
    }
    else {
      throw new ObjectIsNotPersistentException();
    }
  }

}
